Interest in solar power is increasing, spurred in part by international demand for alternative energy and a recent increase in the price of oil. As a result, there is more demand for the chemical vital to photovoltaic solar panels: polycrystalline silicon, or polysilicon. Photo: AP Wideworld Related Links: The Top 500 Design Firms: 2010-2011 at a Glance Polysilicon is not a new. It serves as the base for most integrated circuits. Now, many design firms, including CDI Engineering Solutions, see demand for polysilicon growing exponentially. “China has announced that it is committed to solar power and is supplying low-interest loans
Arch dams, classically curved monoliths situated in narrow valleys, are not as common as other types of dams, such as embankment dams and gravity dams. ENR takes a look at some of the biggest arch dams in the world, both completed and under construction.